def __init__(self, pc, name=None):
self.pos = 0
self.closed = True
self.file_size = 0
self.pc = pc
self.buffer = array.array('c')
if name is not None:
self.open(name)
self.buffer_size = INITIAL_PCARDFILE_BUFFER
self.buffer.fromstring(pcardext.read(self.name, 0, self.buffer_size))
def read(self, size):
if size > 0:
if self.pos + size < self.buffer_size:
data = self.buffer[self.pos:self.pos + size].tostring()
self.pos += size
return data
else:
# Read some more in from the card to satisfy the request
while self.pos + size >= self.buffer_size:
self.buffer.fromstring(
pcardext.read(self.name, self.buffer_size,
INCREMENTAL_PCARDFILE_BUFFER))
self.buffer_size += INCREMENTAL_PCARDFILE_BUFFER
return self.read(size)
